Grinding-disk.



A. L. BAUSMAN.

GRINDING DISK.

APPL 1916. 1,203,461. Patented 0 11'. 31,1916.

3 EEEEEEEEEEEE 2- WITNESS v A. L. BAUSMAN.

GRINDING DISK.

ION FILED MAR APPLIC ,1916. I 1,203,461. 4 Patented 001. 31,1916.

3 SHEETS-SHEET 3.

UNITED ST TES PATENT omen.-

ALONZO L. BAUSMAN, OF CHICOPEE, MASSACHUSETTS, ASSIGNOR T NATIONAL EQUIP- KENT COMPANY, OF SPRINGFIELD, MASSACHUSETTS, A CORPORATION OF MASSA- CHUSETTS.

GRINDING-DISK.

Specification of Letters Patent.

Patented Oct. 31, 1916.

This invention relates to reducing or re-' fining disks for reducing chocolate and the likematerial-to a desired degree of fineness.

The invention is more particularly adapted for use in a reducing apparatus for the type disclosed in U. S. Letters Patent No.

- 1,035,304, granted to me August v13, 1912.

The object of the invention is to provide reducing disks of the character described which are of generally simplified and im-.

proved construction and which are characterized by provision for extended wear under codperative engagement without destroying the eificiency of the reducing action.

Other objects and advantages will appear in the detailed description to follow and in the annexed claims.

For the purpose of showing one manner in which the invention may be practised, a single preferred embodiment thereof is shown in the accompanying drawings in which- Figure l is a sectional elevation of a reducing apparatus with which the improved disks may be used; Fig. 2 is a plan View of the movable disk element; Fig. 3 is. a sectional elevation taken on the line 33 of Fig: 2 and looking in the direction of the arrows; Fig. 4 is a plan view of the stationary disk element; Fig. 5 is a sectional elevation taken on the line 55 of Fig. 4 and looking in the direction of the arrows; Fig. 6 is a sectional elevation drawn to a larger scale and showing a portion of the two disks in mating relation; and Fig. 7 is a sectional.

view taken on the line 77 .of Fig. 6 and looking in the direction of the arrows.

Referring to these drawings, Fig. 1 shows a reducing apparatus with which the improved reducing disks may be employed. A disk 1 keyed to a shaft 2 is rotatable between two spaced disks 3 which are held against rotation. Both faces of disk 1 and the face of each disk 3 adjacent disk 1 are formed with teeth which will be later described. One disk 3 is secured by screws 4 to a fixed head 5, and the other disk 3 is similarly portions Where shield 13 is cut away.

by means of a plurality of bolts 10 threaded.

into the fixed head 5 and between the heads of bolts 10 and the outer face of adjustable head 7 are coiled springs 11. The purpose of the axial adjustability of head 7 and the reason for the use of springs 11 will later appear. Pipes 12 permit chocolate or the like in a semi-liquid condition to enter between each face of disk 1 and a disk 3, which chocolate passes between the disks to the outer peripheries thereof. A shield 13 mounted between heads 5 and 6 and extending about the upper peripheral portions of the disks prevents the chocolate from leaving the latter except at the lower peripheral A trough 14 fixed to head 5 collects the choco-' late leaving the apparatus and conveys it to any suitable receptacle.

The improved tooth construction will now be described with particular reference to Figs. 2 to 7, inclusive. The faces of disk 1 are first formed, by turning, with a plurality of concentric circular ridges 15 which are of triangular cross sectional shape, as shown in Fig. 3, except for a flat portion 16 at the apex of the triangle. Intermediate the ridges 15 are circular slots 17. The faces of disks 3 adjacent disk 1 are similarly formed except that the ridges are staggered with relation to those in disk 1 so that the flats 16 in each disk aline with the slots 17 in the other as clearly shown in Fig. 6. The several ridges 15 are then divided by a milling operation into a large number of teeth. An important feature of the construction is that a single milling operation not only divides the ridges 15 into teeth but shapes them into finished form at the same time. Itis unnecessary thereafter to perform any further operation to shape up the tooth in desired form. It is to be understood that the teeth so formed may, if desired, be backed oif slightly in the usual manner for clearance purposes. The milling cut is preferably made in a radial direction forming slots 19 in the ridges and producing teeth 20 which have vertical cutting faces 21 and inclined rear faces 22, as best shown in Fig. 7. The teeth in adjacent rows are staggered with relation to one another, as shown in Figs. 2 and 4, and preferablythe teeth in at least the first row of each disk are provided with larger grooves 23 therebetween to permit free entrance of the coarser particles of the chocolate to be refined.

In operation, the chocolate in semi-liquid form is fed through pipes 12 in the direction of the arrows, shown in Fig. 1, and as disk 3 1 rotates the chocolate passes through grooves 23 and 19 radially outward to the peripheries of the disks and emerges into trough 14, as already descrlbed. During the passage from the center to the periphcries of the disks, it is subjected to a reducing and refining action by the teeth 20 of which there are many hundreds oneach disk.

The particular tooth construction involving teeth of triangular cross-sectional shape with flattened apices, together with the slots 17, is of particular advantage as it permits extended wear of the disks without destroying or impairing their utility in the reducing action. As the teeth 20 wear, the flats 16 thereon gradually disappear and theapices of the teeth become sharp. The slots 17 likewise decrease in depth as the teeth Wear but permit the sharp points of the teeth to pass therein for clearance purposes, and the depth of the slots controls the useful life of the disks. Thus, the teeth may wear until the points thereof abut the bottoms of slots 17. The bolts 10 permit the head 7 and disk 1, which floats between the disks 2,

' to be moved from time to time to compensate for'wear as well as to control the degree of fineness to which the chocolate is reduced. The springs 11 permit an outward yield to head 7 during the reducing action the mating disks together.

and serve to uniformly and yieldingly force The improved disks described eflicient means of reducing and refining chocolate and may be advantageously used in my reducing apparatus disclosed in my abovementioned prior patent. The particular tooth construction described is also important for the reason that it can be produced economically without sacrifice to the effectiveness of the reducing operation. There are but-two operations required, a turning and a milling operation, and both are of simple character. Moreover, the disks are constructed and arranged for long life with uniform effectiveness as reducing agents throughout their life as distinguished from an effectiveness which gradually diminishes due to wear. In the latter instance, the disks may be scrapped for the decrease in efiiciency in use while there is still some chance for further wear. With my improved disks, scrapping is unnecessary until the full permissible wear of the disks has been enjoyed,

form an and the disks are as eflicientthroughout their life as they are when. new.

It is recognized that changes may be made in the structure herein described for 'il-lus trative purposes without departing from the scope of the invention which is defined by the appended claims rather than by the foregoing description of one preferred form.

What I claim is:

l. A refining apparatus, comprising, relatively rotatable disks whichare provided on adjacent faces with circular rows of teethsaid -teeth being of triangular cross-sectional shape and provided with flattened apices.

3. A refining apparatus, comprising, rela-' tivelyrotatable disks on the adjacent faces of'which are provided circular rows of teeth and circular slots between each row, said teeth having a triangular cross-sectional shape with flattened apices, therows in one disk being staggered with relation to the rows in the other disk so that the apices in one aline with the slots in the other disk,

and means to vary the axial distance between said disks. Y

4. A refining apparatus, comprising, relatively rotatable disks on the opposite adjacent faces of which are provided circular ridges of triangular cross section with flat- Ttened apices and a plurality of grooves di viding said ridges into cutting teeth, said teeth having a verticalcutting face and an inclined rear face, circular slots formed in said disks between the ridges thereof, the ridges of one disk arranged in staggered relation to the ridges in the other 'disk so that the apices of one disk aline with .the

' slots of the other.

5. A refining apparatus, comprising, relatively rotatable disks on the opposite adjacent faces of which are provided circular ridges of triangular cross section'with flattened apices and a plurality of radial' grooves dividing said ridges into cutting teeth, said teeth having an inclined rear face,

circular slots formed in saiddisks between the ridges thereof, the ridges of one disk arranged in staggered relation to the ridges inthe other disk so that the apices of one disk aline with the slots of the other, and means to vary theaxial distance between said disks. ALONZO L. BAUSMAN. 

